TY - JOUR
T1 - Features of the relaxor state in the simple-perovskite mixed-oxide system (1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO3
AU - Tsukasaki, Hirofumi
AU - Tanaka, Yohei
AU - Chiba, Yuki
AU - Koyama, Yasumasa
PY - 2017
Y1 - 2017
N2 - The mixed-oxide system (1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) has a simple perovskite structure and exhibits relaxor behavior for 0 ≤ x ≤ 0.30 (low Ti contents). To understand the relaxor state in PMN-xPT, the crystallographic features of the ferroelectric states were investigated via transmission electron microscopy, taking advantage of Friedel's law failure. Polar regions having '110'C and '001'C components were observed separately both below and near Tm, the maximum temperature of the dielectric permittivity for the relaxor. As a result, the relaxor state for 0 < x ≤ 0.30 was identified as an assembly of nanometer-scale polar domains with rhombohedral symmetry. On the other hand, the ferroelectric states for 0.40 ≤ x ≤ 0.70 are characterized by a ferroelectric MC-type monoclinic state, having a polarization vector in the {100}C planes. Thus, the FR/FMC boundary around x = 0.35 was identified as the morphotropic phase boundary (MPB), nearly parallel to the temperature axis.
AB - The mixed-oxide system (1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) has a simple perovskite structure and exhibits relaxor behavior for 0 ≤ x ≤ 0.30 (low Ti contents). To understand the relaxor state in PMN-xPT, the crystallographic features of the ferroelectric states were investigated via transmission electron microscopy, taking advantage of Friedel's law failure. Polar regions having '110'C and '001'C components were observed separately both below and near Tm, the maximum temperature of the dielectric permittivity for the relaxor. As a result, the relaxor state for 0 < x ≤ 0.30 was identified as an assembly of nanometer-scale polar domains with rhombohedral symmetry. On the other hand, the ferroelectric states for 0.40 ≤ x ≤ 0.70 are characterized by a ferroelectric MC-type monoclinic state, having a polarization vector in the {100}C planes. Thus, the FR/FMC boundary around x = 0.35 was identified as the morphotropic phase boundary (MPB), nearly parallel to the temperature axis.
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U2 - 10.7566/JPSJ.86.034703
DO - 10.7566/JPSJ.86.034703
M3 - Article
AN - SCOPUS:85014691261
VL - 86
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 3
M1 - 034703
ER -